Nathaniel Langford, "The Ascent of Mount Hayden: A New Chapter of Western Discovery", Scribner's Monthly, Vol.VI, No.2, June, 1873, p.129-157

Mr. Jackson, our persevering photographic artist, took a great number of views of the scenery in this vicinity including many of the cascades in the Canon, and the Tetons from all points of the compass. He is an indefatigable worker, and as often camps alone in some of the wild glens as with the company. Give him fine scenery, and he forgets danger and difficulty in the effort to "get a negative."

Editorial note (AG, 11 March 2011): Nathaniel Pitt Langford was a prominent member of the Washburn Expedition of 1870, a lobbyist for making Yellowstone the first national park, and the first park superintendent. Mt. Langford in eastern Yellowstone is named after him.